i don't think there is any free of anything but most therapist will go by a sliding scale payment plan or if you have a university near you the students about to grad as therapist will only charge minimum Ask in your community as sometimes there are free group therapies for depression and anxiety

There are online listeners that are no different than peer to peer support- if they are claiming to be actual counselors with credentials they are probably lying and I would not trust actual therapy to anybody on the internet that you have no way of knowing who you are talking to and what they are doing with your personal information- it is not safe.